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a(n)=1 iff A084196(n)=0;
conjecture: A008578 = range of values > 1.
Table of n, a(n) for n=1..103.
Sequence in context: A170823 A068073 A032452 * A277745 A030314 A269624
Adjacent sequences: A084196 A084197 A084198 * A084200 A084201 A084202
Reinhard Zumkeller, May 18 2003